@article{ref1,
title="Increase safety awareness with signs. Color combination is a vital component in all sign and graphic design and aids in all four of the basic sign design guides",
journal="Occupational health and safety",
year="2007",
author="Townsend, Drue",
volume="76",
number="12",
pages="18, 20-18, 20",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0362-4064",
doi="",
url="http://dx.doi.org/"
}